Valve.



'0. G. SPRADO.

VALVE. Anmoulon num 11110.26, 190s.

rPatented Aug'.9,1910.

IN l/ EN TOR W I TN ESSES:

1HE Nouns P51951: cav. vrasumamn. n, c,

UNITED STATESIATENT OFFICE.

CARLO-.f SPRAIDO, OF MILWAUKEE, WISCONSIN, ASSIGNOR T()` ALLIS-CI-IALMERS COM- PANY, OF`MILWAUKEE, WISCONSIN, A CORPORATION 0F NEW` JERSEY.

VALVE.

To all whom. it may concern:

Be it known that I, CARL G; SPRADO, acitizen of the United States, residing at Milwaukee, in the county of' Milwaukee and State of IVisconsin, have invented certain new and useful Improvements in Valves, of which the following' is a specification.

This invention relates to controlling the flow of` a fluid through a plurality ofpassages in a predeterminedsequence.

This invention has utility when used to control the flow of fluid to a prime motor,

as a reciprocating engine.

This invention is designed to provide a simple and inexpensive valve arrangement for controlling `the flow of a fluid under pressure, as compressed air, for example, to the cylinders of a. double cylinder, fluid engine for starting the sameand theported member is so constructedandlhas its ports so arranged with respect to the ports which are provided in the valve casing 2, thatthe reciprocation of said ported member opens con'mnmication between thesource of supply of the compressed air and each end of the twocylinders of the engine in one sequence for comparatively extended. periods of time, to be followedby a reverse sequence for comparatively short periods of time, making these reverse communications negligible in practical operation.

The object desired, and .which object has been secured by the apparatus shown by the drawings accompanying this specification, to provide a simple and inexpensive form of apparatus which will, in effect, admit the fluid under pressure to a plurality of ports, as for example, the four ports shown, in substantially circular' series, this result being attained by the use of a reciproeable member instead of a rotatable member.

It should be observed that the several ends of the cylinders are not placed in communication with the source of supply of the compressed air in true circular series, as such an operation is manifestly impossible with a recprocable element, but the apparatus described by this `specification and shown by the drawings is found to be practicable -under the conditions of use for which it was designed.

The drawing shows an embodiment of the device. The reciprocable ported member l is guided in the Xed box or casing 2, into which member 2 leads the pipe 3. The pis- Specicaton of Letters Patent. Application sied December as; 1905.

Patented Aug. 9, 1910. Serial No. 293,582.

ton valve or member l has a pluralityl of series of ports 4 which may be successively brought into registry with ports 5 in the guide member 2. These positions of registry are, different for each series of ports and only one series of the member 1 is in registry with ports ofthe member 2 at the Sametime. In the member l is a plurality oflw'passages into which the ports 5 open. Each of these passages 6 has an outlet pipe 7. The member 1 has the bolt 8 in one end thereof so that its position ofregistry may be adjusted. The head of this bolt S is engagedf by the rocker 9 which is positively actuated by*` the cam ll() mounted on the shaft 11.

The operation of theapparatus is as follows: The shaftl11 being rotated bythe engine in the direction indicated by the arrow, thecam l0 secured thereto will'be rotated, and with the ported valve member in the position as shown by thedrawings, when the depressedpart A on the cam is engaged by the rocker `9, the `air u nder pressure will force the ported valve memberup (as shown by the drawings) so that the uppermost ports il of? said member will register with the uppermost ports in the casing, whereby the compressed air will pass to the lefthand end of the left hand cylinder. As the cam l0 continues torotate, the ported valve member will be depressed to the position as shown by the drawings, thereby cutting' off the supply of compressed air to the end of the cylinder just mentioned, but on a further rotation of the cam 10 the second series of ports from the top in the ported valve member will be brought down into registry with the second series of ports in the casing and the air under pressure will be admitted to the right hand end of the left hand cylinder. On a further rotation of the cam 10, the ported valve member will be forced farther down, bringing said ports out of register and bringing the third series of ports in the ported valve member into register with the third series of ports in the casing, thereby admitting the air under pressure to the left hand end ofthe right hand cylinder. On a further rotation of the cam l0, the ported valve member will be forced down, bringing said ports out of register and bringing the lowermost series of ports in the ported valve member into register with the lowermost series of ports in the casing, thereby permitting air'under pressure to pass to the right hand end of the right hand cylinder. The four positions of the cam at which the ports of the ported valve member register with the ports of the casing are indicated by the letters A, B, C, and D, respectively, these portions of the cam being contacted by the rocker arm 9 respectively for the dierent positions of the register of the 10 ports just described. On a further rotation of the cam l0, the rocker 9 will pass from the elevated port-ion of the cam to the depressed portion thereof, this movement being performed very rapidly by reason' of the l5 pressure of the air against the valve member ff/1 withinthercasing,and while each series of the three lower series fportsin the casing will be momentarily in register witliv their co-acting ports in the ported valve member,

20 the time during which they are in register is so extremely limited that no harm results therefrom.

It is to be understood that the cylinders composing the engine which is shown diagrammatically by the drawings are provided with the customary exhaust valves (not shown) which are in common use with this type of engines whereby the air which has been admitted to the cylinders is permitted to escape therefrom at the proper times in the cycle of the engine.

Movement of the cam l() from position D to posit-ion A to again successively register the ports, permits sudden movement of member l to a point of registry. By this construction uniformity is secured in bringing each port into registering position.

What is claimed and it is desired to secure by Letters Patent is:

l. The combination of a casing provided with a plurality of ports, of a reciprocable valve member provided with a like number of ports located within said casing and subjected to the pressure of a fluid within said casing whereby it is adapted to be moved in one direction, means for positively moving said valve member in the opposite direction, each of the ports of said valve member being adapted to register with a port in the casing during a reciprocation of said valve member, each of said ports in said valve member, however, registering with a port in the valve casing at a different period of the cycle than any of the others, said valve member being adapted to be moved from an initial position through a plurality of reciprocations in order to complete its cycle.

X2. The combination, a double acting tandem fluid engine a valve casinor conduits connecting the casing with the respective cylinder ends of the engine, and ay valve co`ntrolx` ling the iiow of fluid to the cylinder ends so as to successively and singly open the conduits for such iow.

8. The combination, a doubleacting tandem fluid engine, a valve casing, conduits connecting the casing with the respective cylinder ends of the engine, a valve cont-rolling the low of Huid to the four cylinder ends, and cam means for operating said valve to control the flow to the cylinder ends successively and in cycles with a quick return from the end of one cycle to the beginning of the next cycle.

In testimony whereof I affix my signature in presence of two witnesses.

CARL G. SPRADO.

Witnesses:

JOHN DAY, Jr., GEO. E. KIRK. 

